70. Primary Camshaft Drive Chain Installation

- Tools Required
- J 39946 Crankshaft Rotation Socket

Notice: Refer to Fastener Notice in Service Precautions.





1. Install the intermediate sprocket shaft (1) and the retaining bolts.
- Tighten the intermediate sprocket shaft bolts to 10 Nm (89 lb in).





2. Align the timing marks (1) of the intermediate and crankshaft sprockets. The marks should be aligned vertically in the installed position.
3. Install the primary timing chain on the drive sprockets.
4. Make sure that piston number one is at Top Dead Center (TDC) and the crankshaft keyway is approximately at the one o'clock position.





5. Install the primary timing chain (3), intermediate sprocket and crankshaft sprocket as an assembly onto their respective shafts (2 & 4). Use the J 39946 to align the crankshaft key (1) with the drive sprocket.
6. Install the intermediate sprocket retaining bolt.
- Tighten the intermediate sprocket shaft bolt to 60 Nm (44 lb ft).





7. Collapse the primary timing chain tensioner using the following procedure:
7.1. Rotate the ratchet release lever counterclockwise and hold.
7.2. Collapse the tensioner shoe and hold.
7.3. Release the ratchet lever and slowly release the pressure on the shoe.
8. As the ratchet lever moves to its first click, hold the tensioner shoe inward. Insert a pin through the hole in the release lever. The locked ratchet mechanism should hold the shoe in a collapsed position.





9. Install the primary timing chain guide (1) and retaining bolts.
- Tighten the primary timing chain guide bolts to 25 Nm (18 lb ft).





Important: Make sure the tensioner release lever faces toward you before tightening.

10. Install the primary timing chain tensioner and retaining bolts.
- Tighten the primary timing chain tensioner bolts to 25 Nm (18 lb ft).





11. Make sure the timing marks (1) are aligned vertically.
12. DO NOT remove the pin holding the tensioner until the secondary timing chains are installed.